the act of subtracting (removing a part from the whole); "he complained about the subtraction of money from their paychecks"
an arithmetic operation in which the difference between two numbers is calculated; "the subtraction of three from four leaves one"; "four minus three equals one"
the act of introducing variety (especially in investments or in the variety of goods and services offered); "my broker recommended a greater diversification of my investments"; "he limited his losses by diversification of his product line"
the condition of being varied; "that restaurant's menu lacks diversification; every day it is the same"